PT-2010-4080 · Linux+1 · Linux Kernel+1

Eugene Teo

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Published

2010-08-10

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Updated

2023-02-13

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CVE-2010-2524

CVSS v2.0

4.6

Medium

VectorAV:L/AC:L/Au:N/C:P/I:P/A:P
Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 2.6.35
Description The issue is related to the DNS resolution functionality in the CIFS implementation. It relies on a user's keyring for the dns resolver upcall in the cifs.upcall userspace helper, allowing local users to spoof DNS query results and perform arbitrary CIFS mounts. This is related to a "cache stuffing" issue and MS-DFS referrals.
Recommendations For Linux kernel versions prior to 2.6.35, update to version 2.6.35 or later to resolve the issue. As a temporary workaround, consider restricting access to the cifs.upcall userspace helper to minimize the risk of exploitation. Avoid using the add key call in the affected functionality until the issue is resolved.

Fix

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Related Identifiers

CVE-2010-2524
DSA-2264-1
RHSA-2010:0610
RHSA-2010_0610

Affected Products

Linux Kernel
Red Hat